Treating the surfaces of hat bodies



Patented May. 21', 1929.

UNITED STATES PATENT OFFICE.

vrxron mum, on ma, aus'rnut rm'rme rm: suaracas or EAT mam No Drawing.Application filed bctober 2, 1925, Serial No. 80,118, and in AustriaIovember so, 1524. V

This invention relates. to a method of im proving the surface of hatbodies made of hair or wool and of hats made from such bodies. Themethod consists in this, that the hat bodies or hats are treated withaldehydes, ketones, or the like or with compounds of the same or withmaterials which, on decomposing, yield such substances. In the case ofvelour bodies the success of such a method of treatment consists in thisthat the gloss is enhanced and the value of the body is therebyincreased. In the case of smooth bodies or hats the success of themethod consists in making them smooth and fine to the touch, wherebytheir value is increased.-

Suitable substances for carrying out the method are the aldehydes, suchas formaldehyde, acetaldehyde, benzaldehyde and the like, compounds ofthe same more especially with bisulphites and aldehyde mixtures, andketones, such as acetone, benzophenone,

, acctophenone or the like, and compounds and mixtures of thesesubstances, also -materials, .25 which, on decomposing, yield suchsubstances.

In carrying out the method the hat body or hat is placed in a solutionof an aldeh dc, for instance formaldehyde, slightly 'acidu- 3O latedwith sulphuric acid or hydrochloric acid, or in a similarly a-cidulatedsolution of- .of hat bodies which comprises borate, permanganate or thelike. The gloss can be still further enhanced by this subsequenttreatment.

The hat body may be subjected to the method accordin toxthe presentinvention before or after rushing, before or after dyeing and beforeor'after shaping.

The ordinal brushing operation on the brushing mac ema be combined withthe applying of the al ehyde or ketone.

In carrying out the method according to the invention the 'bodiesor hatsmay be steamed with a'ldeh de or ketone vapours, for instance formaldehyde vap 'urs, the surface being previouslymoistened or not. V

Aldehydes and ketones have in common the feature nicely distinguishingthem'from' any other organic compounds that they con- .tain one or morecarbonyl (C=O). groups.

WhatI claim is: 1. The method of improving the surface of hat bodieswhich comprises treatingsaid surfaces with a neutral reagent containinga carbon 1 group.

2. 'T e method of-improving the surface I of hat bodies'which'comprises'treating said surfaces with a neutral reagent containin acarbonyl group and subsequently treatlng said hat surfaces with anoxidizin agent.

3. The method of improving t esurface treating said surfaces withformaldehyde.

4. The method of improving the surface of hat bodies which comprisestreating such surfaces with formaldehyde and subsequently treating suchhat surfaces with an oxidizingnagent. j

' witness whereof I have hereunto signed my name.

DVIKTOR BoHM.

